As tensions between North Korea and the U.S. rise, a foreign school in Busan has warned students about a possible war on the Korean Peninsula.

Busan International Foreign School sent an email to its 500 expatriate students and their parents on April 24 explaining the situation with North Korea's nuclear and missile tests and what to do in case of an emergency, such as war.

The email said if foreign embassies request an evacuation of their citizens, the school will inform students and parents and cancel classes temporarily. It also said that parents would need to take their children home if the school bus was unavailable. If it was unsafe to return home, the school would provide students with food and water.

The school issued similar guidelines via email when the Fukushima Daiichi nuclear disaster occurred in Japan in 2011.

The city's other foreign school in Haeundae-gu district also sent parents guidelines about war this month. A Japanese school in the city's Suyeong-gu district made parents aware of the tensions on the Korean Peninsula through email.